Manufacture of firecrackers



Aug. 23, 1932. T. G. HlTT MANUFACTURE OF FIRECRACKERS Filed Jan. 12, 1951 .Y lllllllllllll Il llllllllllllllll lak Patented Aug. 23, 1932 Y 'rrroMAs e. Hrrni or SEATTLE, WASHINGTON FFESCE MANUFACTRE onrrnncnncxnns l Application led January 12, 1931,. NSerial' 1\To."5 (`)8,42`18.

i This invention relates to pyrotechnics; and more particularly, to a new method of manufacturing and assembling iirecrackers of the type covered in my Patent No. 1,253,- `f` 596, patented January 15,1918.

y 1The prime object is to construct a recraclrer consisting of a bag filled with an explosive placed in a tube intermediate4 the ends of said tube, the ends of the tube being open in A1Q such a mannerthat there will be no chance `for wrinkles or twisted bags which sometimes occurs when the bags are filled independentof the tube and afterwards forced therein. Heretofore the tubes have been 1" 'l5 rolled in a certain length and diameter, and

the bags formed independent of the tube and filled with the explosive, the fuse placed in the bag and the same tied, after which the bag is forced into the tube. As these bags are hand made and filled, it is almost impossible to have a uniform bag that exactly lits the tube. Invariably the bag is either slightly undersize'or oversize. Where the bag is undersize, an inferior detonation results as i 525e the gases have a chance to escape from the conning baginte the air space between the tube` and the bag before the detonation occurs. In the case of the oversize bag, the same becomes twisted or bent in being forced into the tube which may result in a burning instead `of a detonation, or a plurality of weak explosions.

By placing the empty bag in the tube on a former and then filling the same with the `explosive after the `former has been removed, a uniform tight lit is always obtained which results `in a loud detonation and a very :l superior structure.

` Another object is to provide a irecracker of the type described herein, the bag containing the explosive charge being always closely adjacent the inner wall of the tube.

Other objects will be disclosed in the specification and claims forming a part of this application.

In the drawing.:

`Figure 1 is a vertical section showing the bag slightly projecting from the open ended tube, with the former extending therefrom preparatory to filling;

Figure 2*is a vertical section showing the bags still projecting from the tube with fuses inscrted therein, lthe mouth of. thebag tied; Figure 8 is a vertical section of the finished article showing the `bag in dotted lines.

- VReferring tothe drawing in which similargparts areed'es'ignatedwith like numerals:

Numeral4'designates a tube or casing of light wrapping material having open ends 5 and,6. Within the tube 4 is placed a bag 7 formed cf paperona former 14 having one end 8 closed byfturning the'` same up along one side of the bag andspacedfrom the .open end 5: The upperend 9, which is open, projects `above the open end 6, as shown in lFigure Explosive material 10, preferably a flash-material similar to that disclosed in my `Patent No. 1,253,597, is placed' in the 'open mouth `of the bag 7, aV fuse l1 being 70 placed therein, after which the mouth of the bag is" securely tied. `The bag 7 is then pushed down into the tube 4 so that the ex-V plosive" charge will'be spaced from the open ends 5 and. 6of the tube4. A settle 12, hav- 75 ing "a stud V13'is used to hold the tube 4, the

end 6 being placedover the stud 13.

'Asactually made," the ,tubes 4`are formed either on tubebendingmachines or by hand Aand labelled, `and then set up. on settles 12. The bags 7 are formed on formers 14 of the exact diameter of thetubes 4, ends 8 being formed closed Von the. formers and thrust into the tubes 4Q The studs 18 extend up into the tubes 4 a suilicient distance so that when the 35 ends 8 conta-ct with the studs 13, the openends 9 will extend above the ends 6 of the tubes 4. Measuring spoons, not shown, containing thel correct amount of explosive, are then used to fill the bags. Since the bags have been formed on formers the bottom end of the bag being turned up along one side and inserted in the tube Vwhile still on the former, there will be no.

wrinkles present and the sides of the bag will be in close proximity to the sides of the tube. The filling of the bag With the explosive serves to hold the side of the bag extended against the inner wallsof the tube 4. `The fuses 11` are then inserted inthe explosive m0 l. Method of making firecrackersvconsisting in inserting a flexible bag in a tube to a.

distance short of the bottom of'said't'ube', and

lling` said bag with an explosive material p .for forcing the sides of the .bagagainst the ysides vof the tube with pressure sufficient to hold the bag ineposition.

2. 'Method of makingirecrackers consistbag, lling the bag with an explosive material for forcingV the sides of the bag against the sides of the tube with a sticking frictional pressure suiicient to hold the bag in position,l inserting means for ignitingthe explosive in the mouth of the bag andl closing the same, removing the tube from the settle and-forcing the bag into the tube so that thereV is a space above andbelow the explosive contents of the bag.

Vn'testimony'whereof aiix my signature.

,1 THOMAS G. HITT.

ing in insertingthe bottom portion ofa bag d into a tube, kleaving Vthe mouth projecting tabove the top of the tube, filling the bag with vanexplosive material for forcing thel sides l of the bag against the sides ofthe tube with tion, inserting means adapted to ignite the `5'. Method Vof Vproducing a ,explosive material in the mouth of the bag,

closing the mouth of the bag and forcing the bag into an intermediate position in the tube so that there is a space above and below said bag. ,Y

n 3. Method of producing recrackers-of the open ended type consisting of placing one .pressure suiicient to hold the bag in posi- .end of an open ended tube on the projecting portion of a settle, inserting the bag 'in the v opposite end of the tube until the bottom por- .A

tion contacts with the projecting portion of v thesettle, filling the bag with anrexplosive lso that the sides of the bag contact with the interior walls of the tube with `a sticking frictional pressure, inserting means for igniting closing` the same, removing the tube from.

the settle and forcing the bag intothe tube 'i Y so' thatthere is a space above and below the -explosive contents of the bag. v Y Y 4'. Method of producing recrackers of the open ended type consisting of placing a tube on a settle, forming a bag on Va former, inserting the bag on the former into` the tube, removing the former from the bag, flllingthe bag with an explosive for forcing the sides of theexplosive in the mouth of the bag and l the bag against the sides of. the tube with inserting means' for igniting the explosive in the mouth ofthe bag and closin the same. Y

the opencended type consisting of placing one end of an open ended tube on the prov jecting portionY of a settle, forming .a bag on a former, inserting the bag on the former to the, opposite end of the tube until the bottom Vortion contacts with the projecting portion ofthe settle, removing the former from the pressure suiicient to hold-the bag in position,

recracker of ino 

